Earlier quoted context omitted.
> philosophy became irrational This is contradiction. > Eastern philosophy isn't abstract speculation, similar to theology? Why? Due to its goal and its method. The goal was to find the ultimate reality, as they call it. The method was of removing nonsense, not pilling up more abstract concepts. A recursive process of reaching the ultimate base case, if you wish. The culmination is, arguably, the Upanishads and to so…
> This is contradiction. No, it's really not. Philosophy is just inquiry, if the inquiry leads you away from rationalism, you can still follow it, and several philosophers have done so.
As soon as you ceased to follow the method and start to pile up nonsense it could not be called an inquiry anymore. Some other definition is needed, and the word speculation is better candidate or a dogmatic theology.
At least, ceasing to rigorously follow the scientific method disqualifies one from being a scientist. Similarly, ceasing to follow laws of logic and to keep a "converging/recursive process of approximating to what is by removing nonsense and misconceptions" (which maintains so called connection to reality) in philosophy disqualifies one from being a philosopher.
Please, lets not start about so called ultimate existence of abstractions. Categorization of abstractions is another kind of endeavor.
The obvious example is so-called philosophy of death. No one has been there but so many has a lot to say about it.